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Old 05-29-2003, 20:27   #1 (permalink)
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Mod Exhaust or Not?

I was thinking of modifying the exhaust on the XR8 when I eventually get it. I made a few enquires and a cats back 3" system seems to be the go but I can not understand how a single 3" system compared to the dual system it already has can produce better performance and sound. In the "old" days any V8 with a single exhaust system was changed for twin pipes. I know I use to do it myself. Any IDEAS?
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Old 05-29-2003, 22:33   #2 (permalink)
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Ask the guys at herrods they have it down to a tee.

http://www.herrodmotorsport.com/
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Old 05-30-2003, 02:29   #3 (permalink)
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Cats back won't offer much gain apart from a better zorst note. According to Rob about 5kw or so at the rw. Alternatively, some exhaust mod workshops are doing modifications such as resignator removal for a slightly deeper note.

If you want around a 20-25rwkw gain go the full exhaust with hi-flow cats, and the note will sound even better.
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Old 05-31-2003, 07:12   #4 (permalink)
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Re: Mod Exhaust or Not?

Quote:
Originally posted by rod c
I was thinking of modifying the exhaust on the XR8 when I eventually get it. I made a few enquires and a cats back 3" system seems to be the go but I can not understand how a single 3" system compared to the dual system it already has can produce better performance and sound. In the "old" days any V8 with a single exhaust system was changed for twin pipes. I know I use to do it myself. Any IDEAS?
Regards rod c.
Our sainless steel system is twin 2,5 and over the axle 3 inch then twin 2.5 out the rear.Makes around 10 kw+ at the wheels and sounds tough
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Old 06-01-2003, 16:58   #5 (permalink)
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Thanks for the info guys. Will give Herrods a ring.
Cheers rod c.
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